{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:03:24.586861", "data_source": "ERA5", "website": "http://wexa.jamstec.go.jp", "Author": "Patrick Martineau"}, "event_id": {"name": "Event ID", "description": "A unique identifier based on: beginning_date, end_date, longitude, and latitude", "value": "2025-Feb-08_to_2025-Feb-10_263.0_-76.5"}, "event_label": {"name": "Event label", "description": "Integer-valued grid identifier that uniquely labels each detected extreme event in space and time, consistent with the corresponding labels stored in the NetCDF dataset.", "value": 2025020000232}, "status": {"name": "Status", "description": "An ongoing event denotes an event that lasts up to the latest data available. These events are subject to change as newer data is added.", "value": false}, "start_date": {"name": "Start date", "description": "First date on which grid points are under the influence of an event", "value": "February 08 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 10 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "figures_available": {"name": "Figures available", "description": "True if figures were pre-generated for this event", "value": true}, "detection_var": {"name": "Detection variable", "description": "Variable used for the detection scheme", "value": "t2m"}, "event_type": {"name": "Event type", "description": "Type of the event detected", "value": "Cold spell"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 53435.09607117878}, "countries_affected": {"name": "Countries affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the countries affected by an event during its lifetime.", "value": ["Antarctica"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Antarctica"]}, "oceans_affected": {"name": "Ocean basins affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the ocean basins affected by an event during its lifetime.", "value": []}, "center_lat": {"name": "Center latitude", "description": "Latitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": -76.5}, "center_lon": {"name": "Center longitude", "description": "Longitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 263.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "263.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 258.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 271.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -77.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -75.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-102.25, -76.5], [-102.03, -75.97], [-101.5, -75.75], [-101.25, -75.85], [-101.0, -75.75], [-100.75, -75.85], [-100.68, 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regions affected", "value": ["W.Antarctica"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-02-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-101.5, -77.25], [-102.02999999999997, -77.03], [-102.25, -76.5], [-102.02999999999997, -75.97], [-101.5, -75.75], [-101.25, -75.85], [-101.0, -75.75], [-100.75, -75.85], [-100.68, -75.82], [-100.64999999999998, -75.75], [-100.75, -75.5], [-100.52999999999997, -74.97], [-100.0, -74.75], [-99.75, -74.85], [-99.5, -74.75], [-99.25, -74.85], [-99.0, -74.75], [-98.75, -74.85], [-98.5, -74.75], [-98.25, -74.85], [-98.0, -74.75], [-97.75, -74.85], [-97.5, -74.75], [-97.25, -74.85], [-97.0, -74.75], [-96.75, -74.85], [-96.5, -74.75], [-96.25, -74.85], [-96.0, -74.75], [-95.75, -74.85], [-95.5, -74.75], [-94.97000000000003, -74.97], [-94.82, -75.32], [-94.75, -75.35], [-94.5, -75.25], [-94.25, -75.35], [-94.0, -75.25], [-93.75, -75.35], 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t2m anomaly recorded over entire duration", "value": -6.441011054857171}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.982220651444346}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-20.403354486265073, -21.17247725012089, -21.668024610057756]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-23.56770235697425, -24.4688978830973, -24.372249984741188]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.496133937252227, -5.1051631621472895, -5.345364854933519]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.034226984061064, -5.812681561508839, -6.441011054857171]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2056982628037245, -1.3583965030873222, -1.4678933209360683]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.2824528083241113, -1.5513476171517309, -1.7633049272672907]}}